Lightbox work in backend page?

Hi all.

I have a donation plugin, in the backend/setting page, I see the list of attachment file (image or pdf) that donor send by form.
In this case i not able to see image or pdf into of lightbox

I tried change some setting or to use class:
<a hare="imagelink" class="et_pb_more_button ari-fancybox">See image</a>

this worked in some page of my site, but not in backend page.

Any suggestions?

Regards,
Marco